CN109898367B - Preparation method of inkless repeatedly erasable nanofiber paper and product thereof - Google Patents
Preparation method of inkless repeatedly erasable nanofiber paper and product thereof Download PDFInfo
- Publication number
- CN109898367B CN109898367B CN201910094669.4A CN201910094669A CN109898367B CN 109898367 B CN109898367 B CN 109898367B CN 201910094669 A CN201910094669 A CN 201910094669A CN 109898367 B CN109898367 B CN 109898367B
- Authority
- CN
- China
- Prior art keywords
- tungsten
- nanofiber
- air
- jet spinning
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention belongs to the technical field of nano materials, and particularly discloses a preparation method of inkless repeatedly erasable nano fiber paper and a product thereof. The method comprises S1 dissolving a compound containing tungsten element and a high molecular binder in an organic solvent; s2, stirring the reaction solution in an atmosphere to obtain an air jet spinning solution; s3, carrying out air-jet spinning on the air-jet spinning solution to obtain precursor nano fibers containing tungsten elements; s4 preparation of a nanofiber film containing a tungsten compound: drying the precursor nanofiber containing the tungsten element in vacuum to obtain a pure white nanofiber film containing the tungsten compound; and S5, packaging and molding. The invention also provides a product prepared by the method. The rewritable paper based on the color change of the tungsten-containing compound film can be efficiently printed by using ultraviolet rays, and can not cause obvious loss of contrast and resolution ratio by heating for many times, the synthesis process is simple, and the prepared product has good flexibility and waterproof performance.
Description
Technical Field
The invention belongs to the technical field of nano materials, and particularly relates to a preparation method of inkless repeatedly erasable nano fiber paper and a product thereof.
Background
Photochromic refers to the fact that certain compounds undergo a change in their molecular structure under the action of light of a certain wavelength and intensity, which results in a corresponding change in the absorption peak, i.e., color, of the light, and this change is generally reversible. With the progress of science and technology and the development of society, nano materials gradually permeate into various fields. The invention of paper as writing material greatly promotes the development and spread of civilization. However, its large-scale production and use also pose significant environmental and sustainability problems for modern society. In order to reduce the production and consumption of paper, it is highly desirable to develop alternative rewritable media that can be used multiple times.
Therefore, rewritable paper based on color change of a tungsten-containing compound thin film has been studied, which can perform high-efficiency printing using ultraviolet rays and cause no significant loss in contrast and resolution by heating a plurality of times. The research on the photochromism of the tungsten-containing compound is only limited to tungsten oxide, and the synthesis process thereof is complicated, and the photochromism thin film is poor in flexibility. Therefore, the present invention is to provide photochromic nanofibers and related ink-free erasable nanofiber paper, so as to solve the problems of complex synthesis process and non-reusability of nanofiber paper in the prior art.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a preparation method of inkless rewritable nanofiber paper and a product thereof, the rewritable paper based on the color change of a tungsten-containing compound film can be efficiently printed by using ultraviolet rays, and obvious loss of contrast and resolution ratio can not be caused by heating for many times.
To achieve the above object, according to one aspect of the present invention, there is provided a method for preparing an inkless rewritable nanofiber paper, comprising the steps of:
s1, dissolving a compound containing tungsten elements and a high molecular binder in an organic solvent to prepare a reaction solution;
s2, stirring the reaction solution prepared in the step S1 in an atmosphere of air to obtain an air jet spinning solution;
s3, carrying out air-jet spinning on the air-jet spinning solution prepared in the step S2 to obtain precursor nano fibers containing tungsten elements;
s4, drying the precursor nanofiber containing the tungsten element obtained in the step S3 in vacuum to obtain a nanofiber film containing a tungsten compound;
s5, the nanofiber membrane containing the tungsten compound produced in step S4 is sealed with a flexible material, and a nanofiber paper is obtained.
Further, in step S1, the compound containing the tungsten element is tungsten hexachloride, tungsten tetrachloride, ammonium metatungstate, or tungsten dichloride.
Further, in step S1, the polymer binder is polyvinylpyrrolidone, polyvinyl butyral, or polyvinyl alcohol.
Further, in step S1, the organic solvent is isopropanol, ethanol, N-dimethylformamide, chloroform or diethyl ether.
Further, in step S5, the flexible material is PDMS.
Further, in step S1, the weight ratio of the compound containing a tungsten element to the polymer binder is 1:1 to 2:1, preferably the weight ratio of the compound containing a tungsten element to the polymer binder is 1.5:1 to 1.8:1, and more preferably the weight ratio of the compound containing a tungsten element to the polymer binder is 1.6: 1.
Further, in step S3, the air pressure of the air-jet spinning is 20kPa to 100kPa, the air-jet spinning input distance is 5cm to 100cm, and the liquid flow rate of the air-jet spinning is 0.5mL/h to 5 mL/h;
preferably, the distance of the air jet spinning is 50cm, and the liquid flow rate of the air jet spinning is 3 mL/h.
Further, in step S4, the drying temperature is 50 ℃ to 120 ℃, and the drying time is 12h to 24 h;
preferably, the temperature of the drying is 80 ℃.
According to another aspect of the invention, the inkless repeatedly erasable nanofiber paper is prepared by the preparation method of the inkless repeatedly erasable nanofiber paper.
Further, the nanofiber membrane comprising the tungsten-containing compound of the nanofiber paper and the flexible material for encapsulating the nanofiber membrane containing the tungsten-containing compound.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the invention, by combining the compound containing tungsten element with the air-jet spinning technology and accurately controlling the proportion of the reaction liquid and the air-jet spinning process parameters, compared with the traditional electrostatic spinning technology, the preparation process of the photochromic tungsten-containing compound nanofiber, which is simple, rapid, efficient and energy-saving and suitable for large-scale production, is realized, and meanwhile, the photochromic tungsten-containing compound nanofiber can be synthesized without high-temperature calcination, and the prepared nanofiber paper has the characteristics of complete continuity, uniform diameter distribution and good flexibility.
(2) The invention adopts the reaction liquid with specific proportion as the air-jet spinning liquid of the nano-fiber, and simultaneously, the preparation time and the preparation temperature of the air-jet spinning liquid are correspondingly adjusted, so that the obtained air-jet spinning liquid has the characteristics of fast spinning forming and good forming effect.
(3) The air-jet spinning technology used in the invention accurately controls the relevant air-jet spinning technology parameters, the air pressure of the air-jet spinning is 20 kPa-100 kPa, the air-jet spinning putting distance is 5 cm-100 cm, and the liquid flow rate of the air-jet spinning is 0.5 mL/h-5 mL/h, under the specific air-jet spinning condition, the obtained tungsten-containing compound nano-fiber is heated for many times without causing obvious loss of contrast and resolution ratio.
(4) The invention realizes the synthesis of the photochromic tungsten-containing compound nano-fiber under the vacuum drying condition, the drying temperature is 50-120 ℃, and further, high-temperature calcination is not needed, and the prepared fiber has perfect continuity, uniform diameter distribution and good flexibility.
(5) The photochromic tungsten-containing compound nanofiber is packaged by adopting a flexible material, so that the prepared nanofiber paper has the characteristics of complete continuity, uniform diameter distribution and good flexibility.
(6) The nanofiber paper prepared by the method can be efficiently printed by using ultraviolet rays, can not cause obvious loss of contrast and resolution ratio by heating for many times, and has the characteristics of complete continuity, uniform diameter distribution and good flexibility.
Drawings
FIG. 1 is a flow chart of the preparation of the inkless rewritable nanofiber paper according to the present invention;
FIG. 2 is a Roman spectrum of photochromic tungsten-containing compound nanofibers according to the present invention;
FIG. 3 is an SEM photograph of photochromic tungsten-containing compound nanofibers according to example 1 of the present invention;
FIG. 4 is an SEM photograph of photochromic tungsten-containing compound nanofibers according to example 2 of the present invention;
FIG. 5 is an SEM photograph of photochromic tungsten-containing compound nanofibers according to example 3 of the present invention;
FIG. 6 is an SEM photograph of photochromic tungsten-containing compound nanofibers according to example 4 of the present invention;
FIG. 7 is an SEM photograph of photochromic tungsten-containing compound nanofibers according to example 5 of the present invention;
FIG. 8 is a diagram of a photochromic tungsten-containing compound nanofiber and a diagram for multiple cycles according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, a flow chart of the preparation method of the inkless rewritable nanofiber paper according to the present invention is shown, and the preparation method of the rewritable nanofiber paper comprises the following steps:
s1 preparation of a reaction solution: dissolving a compound containing tungsten elements and a high molecular binder in an organic solvent; the compound containing the tungsten element is tungsten hexachloride, tungsten tetrachloride, ammonium metatungstate or tungsten dichloride, the organic solvent is isopropanol, ethanol, N-dimethylformamide, chloroform or diethyl ether, the high polymer binder is polyvinylpyrrolidone, polyvinyl butyral or polypropylene alcohol, the weight ratio of the compound containing the tungsten element to the high polymer binder is 1: 1-2: 1, preferably the weight ratio of the compound containing the tungsten element to the high polymer binder is 1.5: 1-1.8: 1, and further preferably the weight ratio of the compound containing the tungsten element to the high polymer binder is 1.6: 1.
S2, preparing an air jet spinning solution: stirring the reaction solution prepared in the step S1 in an atmosphere of air to obtain an air-jet spinning solution;
s3 air jet spinning: performing air jet spinning on the air jet spinning solution prepared in the step S2 to obtain precursor nanofibers containing tungsten elements, wherein the air pressure of the air jet spinning is 20 kPa-100 kPa, the air jet spinning is placed at a distance of 5 cm-100 cm, and the liquid flow rate of the air jet spinning is 0.5 mL/h-5 mL/h; preferably, the distance of the air jet spinning is 50cm, and the liquid flow rate of the air jet spinning is 3 mL/h. As shown in fig. 2, is a Roman spectrum of the photochromic tungsten-containing compound nanofiber according to the present invention;
s4 preparation of a nanofiber film containing a tungsten compound: and (4) drying the precursor nanofiber containing the tungsten element obtained in the step (S3) in vacuum to obtain a pure white nanofiber film containing a tungsten compound, wherein the drying temperature is 50-120 ℃, and preferably 80 ℃. The drying time is 12-24 h;
s5 packaging and molding: and packaging the nanofiber membrane containing the tungsten compound prepared in the step S4 with a flexible material to obtain the nanofiber paper, wherein the flexible material is PDMS.
Specifically, the preparation method of the inkless repeatedly erasable nanofiber paper comprises the following steps:
(1) preparing a reaction solution: dissolving a compound containing tungsten elements and a high molecular binder in an organic solvent, wherein the weight percentages of the components are as follows: 5-90% of a compound containing tungsten element, 3-50% of a high molecular binder and 40-60% of an organic solvent;
(2) preparing an air jet spinning solution: stirring the reaction solution obtained in the step (1) at a certain temperature in an air-introducing atmosphere to obtain an air-jet spinning solution;
(3) air jet spinning: transferring the air-jet spinning solution obtained in the step (2) to air-jet spinning equipment, setting process parameters and carrying out air-jet spinning to obtain the precursor nanofiber containing the tungsten element, wherein the air-jet spinning process parameters are as follows: the air pressure of the air jet spinning is 20-100 kPa, the air jet spinning distance is 5-100 cm, and the flow rate of the air jet spinning solution is 0.5-5 mL/h;
(4) and (4) drying the precursor nanofiber prepared in the step (3) in a vacuum drying oven to obtain a pure white nanofiber membrane containing tungsten compounds, wherein the drying conditions are as follows: the drying temperature is 50-120 ℃, and the drying time is 12-24 h.
(5) And (5) packaging the nanofiber membrane obtained in the step (4) with a flexible material to obtain the nanofiber paper.
Wherein the tungsten-containing compound is selected from tungsten hexachloride, tungsten tetrachloride, ammonium metatungstate or tungsten dichloride; the material selected by the high molecular binder is polyvinylpyrrolidone, polyvinyl butyral or polypropylene glycol; the selected organic solvent is selected from isopropanol, ethanol, N-dimethylformamide, chloroform or diethyl ether; the flexible material of the package is PDMS and the like.
According to another aspect of the invention, the inkless repeatedly erasable nanofiber paper is prepared by the preparation method of the inkless repeatedly erasable nanofiber paper, and comprises a nanofiber film containing a tungsten compound and a flexible material for packaging the nanofiber film containing the tungsten compound.
Example 1
Firstly, dissolving 3g of tungsten hexachloride and 3g of polyvinylpyrrolidone in a 5g N, N-dimethylformamide solution to obtain a reaction solution;
then, introducing oxygen into the reaction solution at the temperature of 20 ℃ and stirring at a high speed for 20min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 20kPa, the spinning distance to be 5cm and the solution flow rate to be 0.5mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 12 hours at the temperature of 50 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
Fig. 3 shows an SEM photograph of the photochromic tungsten-containing compound nanofiber according to example 1 of the present invention.
Example 2
Firstly, 4g of tungsten hexachloride and 3g of polyvinylpyrrolidone are dissolved in a 7g N, N-dimethylformamide solution to obtain a reaction solution;
then, introducing oxygen into the reaction solution at 25 ℃ and stirring at a high speed for 25min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 40kPa, the spinning distance to be 20cm and the solution flow rate to be 1mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 14h at the temperature of 60 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
Fig. 4 shows an SEM photograph of the photochromic tungsten-containing compound nanofiber according to example 2 of the present invention.
Example 3
Firstly, 5g of tungsten tetrachloride and 3g of polyvinyl butyral are dissolved in 8g of ethanol solution to obtain a reaction solution;
then, introducing oxygen into the reaction solution at 30 ℃ and stirring at high speed for 50min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 60kPa, the spinning distance to be 40cm and the solution flow rate to be 2mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 16 hours at the temperature of 80 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
Fig. 5 shows an SEM photograph of the photochromic tungsten-containing compound nanofiber according to example 3 of the present invention.
Example 4
Firstly, 6g of tungsten tetrachloride and 3g of polyvinyl butyral are dissolved in 12g of ether solution to obtain a reaction solution;
then, introducing oxygen into the reaction solution at 45 ℃ and stirring at high speed for 50min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 80kPa, the spinning distance to be 80cm and the solution flow rate to be 4mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 20 hours at the temperature of 100 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
Fig. 6 shows an SEM photograph of the photochromic tungsten-containing compound nanofiber according to example 4 of the present invention.
Example 5
Firstly, 4.8g of tungsten dichloride and 3g of polyvinyl butyral are dissolved in 6g of ether solution to obtain reaction liquid;
then, introducing oxygen into the reaction solution at 50 ℃ and stirring at a high speed for 30min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 100kPa, the spinning distance to be 100cm and the solution flow rate to be 5mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 24 hours at the temperature of 120 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
Fig. 7 shows an SEM photograph of the photochromic tungsten-containing compound nanofiber according to example 5 of the present invention.
Example 6
Firstly, dissolving 4.8g of ammonium metatungstate and 3g of polyvinyl butyral in 8g of polypropylene alcohol solution to obtain reaction liquid;
then, introducing oxygen into the reaction solution at 40 ℃ and stirring at high speed for 40min to obtain an air-jet spinning solution;
secondly, transferring the air-jet spinning solution into air-jet spinning equipment, setting the spinning air pressure to be 50kPa, the spinning distance to be 50cm and the solution flow rate to be 3mL/h, and carrying out air-jet spinning to obtain precursor nano-fibers containing tungsten elements;
and finally, placing the obtained precursor nanofiber containing the tungsten element in a vacuum drying oven for vacuum drying for 20 hours at the temperature of 80 ℃ to obtain a photochromic tungsten-containing compound nanofiber sample.
FIG. 8 shows a physical diagram and a multi-cycle diagram of a photochromic tungsten-containing compound nanofiber according to the present invention. Firstly, a rose pattern is printed on (a) of the white nanofiber paper 8 by using ultraviolet rays to obtain (b) of fig. 8, (b) of fig. 8 is processed and then the pattern is removed to obtain (c) of the white nanofiber paper 8, (c) of fig. 8 is printed on a butterfly pattern by using ultraviolet rays to obtain (d) of fig. 8, and 8(d) of the drawing is processed and then the pattern is removed to obtain (a) of the white nanofiber paper fig. 8. The rewritable paper of the present invention based on the color change of the tungsten-containing compound thin film can be printed efficiently using ultraviolet rays and heated many times without causing significant loss of contrast and resolution. Meanwhile, the packaged nanofiber paper is simple in synthesis process, and has good flexibility and waterproof performance. Compared with the traditional electrostatic spinning technology, the air-jet spinning technology used in the invention realizes a simple, quick, efficient and energy-saving photochromic tungsten-containing compound nanofiber preparation process suitable for large-scale production; meanwhile, the photochromic tungsten-containing compound nano-fiber is synthesized without high-temperature calcination, and the prepared fiber has the advantages of complete continuity, uniform diameter distribution and good flexibility. Furthermore, the prepared photochromic tungsten-containing compound nanofiber membrane has the performances of high reversibility, sensitive response rate, multiple cycles and the like, and can realize large-scale production.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A preparation method of inkless repeatedly erasable nanofiber paper is characterized by comprising the following steps:
s1, dissolving a compound containing tungsten elements and a high molecular binder in an organic solvent to prepare a reaction solution; the compound containing the tungsten element is tungsten hexachloride, tungsten tetrachloride, ammonium metatungstate or tungsten dichloride; the high molecular binder is polyvinylpyrrolidone, polyvinyl butyral or polypropylene glycol; the organic solvent is isopropanol, ethanol, N-dimethylformamide, chloroform or diethyl ether; the weight ratio of the compound containing the tungsten element to the high-molecular binder is 1: 1-2: 1;
s2, stirring the reaction solution prepared in the step S1 in an atmosphere of air to obtain an air jet spinning solution;
s3, carrying out air-jet spinning on the air-jet spinning solution prepared in the step S2 to obtain precursor nano fibers containing tungsten elements; the air pressure of the air jet spinning is 20 kPa-100 kPa, the putting distance of the air jet spinning is 5 cm-100 cm, and the liquid flow rate of the air jet spinning is 0.5 mL/h-5 mL/h;
s4, drying the precursor nanofiber containing the tungsten element obtained in the step S3 in vacuum to obtain a nanofiber membrane containing a tungsten compound; the drying temperature is 50-120 ℃, and the drying time is 12-24 h;
and S5, packaging the nanofiber membrane containing the tungsten compound and prepared in the step S4 with a flexible material to obtain the nanofiber paper.
2. The method according to claim 1, wherein in step S5, the flexible material is PDMS.
3. The method according to claim 1 or 2, wherein the weight ratio of the compound containing the tungsten element to the polymer binder is 1.5:1 to 1.8: 1.
4. The method of claim 3, wherein the weight ratio of the compound comprising the tungsten element to the polymeric binder is 1.6: 1.
5. The method according to claim 1 or 2, wherein in step S3, the air jet spinning is carried out at a distance of 50cm and a liquid flow rate of 3 mL/h.
6. The method according to claim 1 or 2, wherein the temperature of the drying in step S4 is 80 ℃.
7. An inkless rewritable nanofiber paper prepared by the method for preparing the inkless rewritable nanofiber paper as claimed in any one of claims 1 to 6.
8. The inkless rewritable nanofiber paper according to claim 7, comprising a nanofiber film containing a tungsten compound and a flexible material for encapsulating the nanofiber film containing a tungsten compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094669.4A CN109898367B (en) | 2019-01-31 | 2019-01-31 | Preparation method of inkless repeatedly erasable nanofiber paper and product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094669.4A CN109898367B (en) | 2019-01-31 | 2019-01-31 | Preparation method of inkless repeatedly erasable nanofiber paper and product thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109898367A CN109898367A (en) | 2019-06-18 |
| CN109898367B true CN109898367B (en) | 2020-06-05 |
Family
ID=66944413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910094669.4A Active CN109898367B (en) | 2019-01-31 | 2019-01-31 | Preparation method of inkless repeatedly erasable nanofiber paper and product thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109898367B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321630B (en) * | 2020-03-20 | 2022-04-29 | 东莞东阳光科研发有限公司 | Composite photo printing paper and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106978181A (en) * | 2017-05-14 | 2017-07-25 | 复旦大学 | The orthogonal fluorescence-encoded anti-fake material of long afterglow is changed in a kind of near infrared light charging |
| CN107498939A (en) * | 2017-07-10 | 2017-12-22 | 东华大学 | Ventilative high-elastic type single electrode friction nanometer power generator of one kind and preparation method thereof |
| CN107587208A (en) * | 2017-09-28 | 2018-01-16 | 华中科技大学 | A kind of preparation method and product of tungsten nitride nanofiber |
| CN107653574A (en) * | 2017-09-25 | 2018-02-02 | 山东大学 | Polyacid/polymer-based nanometer flexible fiber film and preparation method thereof and photoresponse be erasable and metal reduction in application |
| CN107938027A (en) * | 2017-12-19 | 2018-04-20 | 华中科技大学 | A kind of pure tungsten nanofiber, its preparation method and application |
-
2019
- 2019-01-31 CN CN201910094669.4A patent/CN109898367B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106978181A (en) * | 2017-05-14 | 2017-07-25 | 复旦大学 | The orthogonal fluorescence-encoded anti-fake material of long afterglow is changed in a kind of near infrared light charging |
| CN107498939A (en) * | 2017-07-10 | 2017-12-22 | 东华大学 | Ventilative high-elastic type single electrode friction nanometer power generator of one kind and preparation method thereof |
| CN107653574A (en) * | 2017-09-25 | 2018-02-02 | 山东大学 | Polyacid/polymer-based nanometer flexible fiber film and preparation method thereof and photoresponse be erasable and metal reduction in application |
| CN107587208A (en) * | 2017-09-28 | 2018-01-16 | 华中科技大学 | A kind of preparation method and product of tungsten nitride nanofiber |
| CN107938027A (en) * | 2017-12-19 | 2018-04-20 | 华中科技大学 | A kind of pure tungsten nanofiber, its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109898367A (en) | 2019-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110389464B (en) | Electrochromic/deformable film for electric heating and preparation method thereof | |
| CN108265400B (en) | Preparation method of flexible white fluorescent nanofiber membrane | |
| US10505156B2 (en) | Method of patterning quantum dot layer, quantum dot light emitting device, and method of manufacturing the same | |
| CN109898367B (en) | Preparation method of inkless repeatedly erasable nanofiber paper and product thereof | |
| CN108893863A (en) | A kind of ZIF-8/ polyvinylidene fluoride composite nano fiber film and its preparation method and application | |
| CN107723927B (en) | TPU (thermoplastic polyurethane) fiber-based waterproof moisture-permeable film with photochromic function and preparation method thereof | |
| CN106466599B (en) | A kind of preparation method of the tungsten trioxide nano fiber of core-shell structure | |
| CN113135755B (en) | Flexible cerium acid rare earth high-entropy nanofiber ceramic membrane and preparation method and application thereof | |
| CN105019142A (en) | Preparation method for micro and nano PET fiber with large pore volumes | |
| CN111439742B (en) | Preparation method of white light carbon dots | |
| CN113736118A (en) | Preparation method of perovskite quantum dot film with stability, luminescence and flexibility characteristics and product thereof | |
| CN112980425B (en) | Solid powder color-changing material for non-contact induction quick response and preparation method thereof | |
| CN104451957A (en) | Low-density SiC nanofibers and preparation method thereof | |
| CN110743626A (en) | Method for 3D printing of porous catalytic device and porous catalytic device | |
| CN102127825B (en) | Preparation method of polymer fluorescent colorful fibre | |
| CN108796661B (en) | Electrostatic spinning preparation method of platinum-doped fluorescent nanofiber | |
| CN103204538B (en) | Preparation method of porous ZnO and ZnO/Ag nanometer free-standing film | |
| CN108547009B (en) | Nano fluorescent fiber material and preparation method thereof | |
| CN115723457A (en) | Reversible humidity response fluorescent color-changing system, preparation method and application thereof | |
| CN113429638B (en) | Method for preparing erasable rewritable medium with rapid color change and high cycle number | |
| CN105417519A (en) | Method for preparing quantum dot invisible ink based on laser-induced technology | |
| CN100385059C (en) | Making method of centre fibre embroidary | |
| CN113912896B (en) | Composite anti-counterfeiting film preparation method based on photonic band gap matching | |
| CN110103560A (en) | Improve the black phosphorus preparation method of composite film of black phosphorus stability | |
| CN114315732A (en) | Fluorescent material and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |